utf-8 special characters array php
<?php
//http://www.lsi.usp.br/~help/html/iso.html
return [
'Á' => 'Á',
'á' => 'á',
'Â' => 'Â',
'â' => 'â',
'à' => 'à',
'À' => 'À',
'Å' => 'Å',
'å' => 'å',
'Ã' => 'Ã',
'ã' => 'ã',
'Ä' => 'Ä',
'ä' => 'ä',
'Æ' => 'Æ',
'æ' => 'æ',
'É' => 'É',
'é' => 'é',
'Ê' => 'Ê',
'ê' => 'ê',
'È' => 'È',
'è' => 'è',
'Ë' => 'Ë',
'ë' => 'ë',
'Ð' => 'Ð',
'ð' => 'ð',
'Í' => 'Í',
'í' => 'í',
'Î' => 'Î',
'î' => 'î',
'Ì' => 'Ì',
'ì' => 'ì',
'Ï' => 'Ï',
'ï' => 'ï',
'Ó' => 'Ó',
'ó' => 'ó',
'Ô' => 'Ô',
'ô' => 'ô',
'Ò' => 'Ò',
'ò' => 'ò',
'Ø' => 'Ø',
'ø' => 'ø',
'Õ' => 'Õ',
'õ' => 'õ',
'Ö' => 'Ö',
'ö' => 'ö',
'Ú' => 'Ú',
'ú' => 'ú',
'Û' => 'Û',
'û' => 'û',
'Ù' => 'Ù',
'ù' => 'ù',
'Ü' => 'Ü',
'ü' => 'ü',
'Ç' => 'Ç',
'ç' => 'ç',
'Ñ' => 'Ñ',
'ñ' => 'ñ',
'<' => '<',
'>' => '>',
'&' => '&',
'"' => '"',
'®' => '®',
'©' => '©',
'Ý' => 'Ý',
'ý' => 'ý',
'Þ' => 'Þ',
'þ' => 'þ',
'ß' => 'ß',
' ' => ' ',
'°' => 'º',
'•' => '•',
'–' => '-',
];